Questions are in short answer format and include an answer key. They're a great way to help readers who struggle with basic plot comprehension. I've found them particularly helpful for students struggling to pass their AR or SRC quizzes. They're called "Chapter-by-Chapter Reading Comprehension Questions" because they're designed to help the student follow along with the plot as it unfolds, which usually means there's one question to be answered at the end of every chapter.
Questions are also available for other books in the Captain Underpants series.
More reading tools available at Nothing But Kids Books!